Question: Name the least flammable nitrogen-containing class IIIB combustible liquid
Paraphrase: What class IIIB combustible liquid that contains nitrogen is the least flammable?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q21009059 . ?ent wdt:P2202 ?obj . ?ent wdt:P527 wd:Q627. } ORDER BY ASC(?obj)LIMIT 5 
Answer: toluene 2,4-diisocyanate, diethanolamine